build: Updating npm dependencies

* eslint-config-wikimedia: 0.28.0 → 0.28.2
* grunt-stylelint: 0.20.0 → 0.20.1
* stylelint-config-wikimedia: 0.17.1 → 0.17.2

Change-Id: I7440d8e40e7b7963a9d7d3fc8a14d440baa329fe
3 files changed